Cecidomyiidae

Rhopalomyia

Euthamia caroliniana

Alabama

Connecticut

Delaware

Florida

Georgia

Kentucky

Louisiana

Maine

Maryland

Massachusetts

Mississippi

New Hampshire

New Jersey

New York

North Carolina

Pennsylvania

Rhode Island

South Carolina

Vermont

Virginia

Nova Scotia

Ontario

Euthamia graminifolia

Colorado

District Of Columbia

Idaho

Illinois

Indiana

Iowa

Michigan

Minnesota

Missouri

Montana

North Dakota

Ohio

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Tennessee

Washington

West Virginia

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British Columbia

Manitoba

New Brunswick

Newfoundland and Labrador

Northwest Territories

Prince Edward Island

Quebec

Saskatchewan

Saint Pierre and Miquelon

Rhopalomyia fusiformae

Galls are monothalamous and green to purple. The biology is probably similar to that of *pedicellata*...Host: *E. graminifolia*...

The plant-feeding gall midges of North America

The galls of this species ... are identical to those of R. pedicellata ... except for the lack of a pedicel. This difference is consistent and no intermediate forms were found. The galls are found on leaves, stems and inflorescences, are 6–12 mm long, 1–2 mm wide at the base, and tapered towards apex. Galls are often found in aggregations ...They are smooth, green to purplish-green with longitudinal darker lines, contain a single chamber, and are smooth and shiny on the inside.

Revision of the goldenrod-galling Rhopalomyia species (Diptera: Cecidomyiidae) in North America